Topline Maxx Struts or similar to allow wider/deeper offset wheels. Strut tower brace, rear Kafer Cup brace, appropriately sized front and rear sway bars. 4 wheel disc brakes. Porche brakes are nice but some say overkill. Set a limit of an 8 inch wide tire in the front and a 10 in the back. That should suit you fine. Anything larger is probably unneccesary anyway.
You really, really should drive a superbeetle(stock if possible) so you know what you are getting into. It does not take much to make one perform just rediculous. I've gone from stock to lowered with Maxx Struts, 17 inch wheels, strut tower brace, swaybars, etc.
The difference in handling and overall performance is HUGE.
